Know the Essential Data Structures and Algorithms for Data Scientists

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Know the Essential Data Structures and Algorithms for Data Scientists

keerthi reddy

@keerthireddy

October 11, 2022

Data Science & AI Community

142

A data structure is a particular way of accessing and using data in a system. The more comprehensive response is that a data structure binds data organization, management, retrieval, and storage into a single format that makes it easy for users to access and modify data quickly. It entails compiling data values, their relationships, and pertinent operations or functions.

Here is a specific example. To locate a book on 20th-century military history, visit the library's History section. Then, after locating the section designated for military history, you would browse the books chronologically until you came to the 20th century. When you think of the books and the library's sorting system as your data structure, you're ready to go.

What Makes Data Structure Important?

The amount of data processed in the digital world increases yearly. According to Forbes, 2.5 quintillion bytes of data are generated everyday. In 2020, more than 90% of the data used was created in the previous two years! The Internet of Things is largely to blame for this data explosion (IoT). Data structures are necessary to manage the massive amounts of generated data as well as to improve algorithm efficiency.

Finally, if you want a career as a data scientist or programmer, your educational path needs to include learning about data structures and algorithms because almost all software applications use them. The more you understand the concepts, the more at ease and confident you will be in answering data structure interview questions.

Algorithm

An algorithm is a well-designed series of detailed instructions used to complete a particular task or solve a problem. The task could be as straightforward as multiplying two numbers or as complicated as playing a music file. Algorithms are frequently written as functions when they are used in computer programming.

Algorithms are occasionally brought up concerning social media and advertising. Consider the scenario where one day, you decide to search for leather gloves on Google while online. After receiving your results and feeling successful, you take a break to check Facebook to see if any of your friends are online. When you log in, a Facebook advertisement for gloves greets you! How come? That is a digital marketing algorithm automating the process of showing you ads based on your previous searches.

Techniques for Data Structure Searching

When we speak of data structure searching techniques, we really mean search algorithms because data scientists use algorithms to perform data searches. Because of this, any aspiring data analyst or data scientist should be familiar with binary and linear search algorithms.

Linear

A linear search algorithm looks at each item in a data input file until the right one is discovered. Because the search time exactly matches the number of items in your search, for example, 40 items/input = 40 checks/complexity, this type of search is known as a linear search. Since each element of the array or list is checked in turn, linear searches are also known as sequential searches.

Binary

In order to find the object in question, a binary search algorithm divides the input into two parts (hence the clever name "binary"). The desired search item is present in only one-half of the sample. The algorithm keeps going until the divided item becomes the sought-after object. Think of it as a very structured and disciplined process of elimination. Interval searches and binary searches are similar terms.

A Closer Examined Two Beneficial Data Search Methods

Dynamic Programming (DP)

Use dynamic programming if you're stuck in programming and facing a huge, overwhelming problem. DP takes its cue from the idiomatic riddle, "How do you eat an entire elephant?" The answer is to take one bite at a time! Dynamic programming is used to break a large problem down into numerous smaller issues. Each sub-problem that DP solves has results that are saved. In order to solve the main problem, DP ultimately combines all the results that were saved.

Matching String Patterns

Instead of looking for a specific item, you're searching for a pattern in a collection of items. The search is made more specific by these pattern matches.

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